<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="bundle.js"></script>
</head>
<body>
    <div id="div1">
        <input type="button" value="按钮一" class="active"/>
        <input type="button" value="按钮二" />
        <input type="button" value="按钮三" />
        <div class="show">选项卡一</div>
        <div class="dd">选项卡二</div>
        <div class="dd">选项卡三</div>
    </div>
    <div id="div2">
        <input type="button" value="按钮一" class="active"/>
        <input type="button" value="按钮二" />
        <input type="button" value="按钮三" />
        <div class="show">选项卡一</div>
        <div class="dd">选项卡二</div>
        <div class="dd">选项卡三</div>
    </div>
    <div id="div3">
        <input type="button" value="按钮一" class="active"/>
        <input type="button" value="按钮二" />
        <input type="button" value="按钮三" />
        <div class="show">选项卡一</div>
        <div class="dd">选项卡二</div>
        <div class="dd">选项卡三</div>
        <button id="btn1"><</button>
        <button id="btn2">></button>

    </div>
</body>
</html>